Hello,
the way is written there Activation & deactivation help>>> (see there only to understand the procedure) Common activation problems >>> "Activation limit reached for [product]. This serial number has already been activated on 2 computers." "Maximum activations exceeded."
>>> How to deactivate or sign out >>> A single license for Adobe software lets you install the applications on two computers—for example, at home and at the office. However, you can use the software on only one computer at any given time.
If you want to install the software on a third computer, deactivate the software on the computer on which you will no longer use the software. Then, activate the software on the new computer.
Hans-Günter